6.6 oz/ly (CA), 4 oz/sq yd (US), 134 gsm (EU). 100% performance polyester double-knit jersey. No bleed fabric (NBF) created with a unique cationic dye process for easy printing. Self-fabric collar. Moisture wicking. Breathable. Tagless. Classic fit. Due to the nature of polyester, special care must be taken throughout the decoration process. Please refer to product size spec PDF file for more details.